Low Dose CT Chest (LDCT) screening helps detect lung cancer at an early stage, reducing risk and improving treatment opportunities.
Currently, lung cancer screening can be done using low-dose computed tomography (LDCT), which is a three - dimensional imaging method that provides higher resolution than regular X-rays.
Clinical studies have found that annual LDCT screening for early-stage lung cancer can reduce lung cancer mortality by as much as 20 - 30%* in high-risk individuals. Early detection of lung cancer before symptoms appear allows for prompt treatment and effective outcomes, with patients receiving a lower radiation dose compared to standard computed tomography (CT) chest scans.
Getting to Know Low Dose CT Chest (LDCT)
Low Dose CT Chest is a low-radiation computed tomography scan of the chest area that produces 3D images with good detail of the lungs. Even with a low radiation dose and without the need for contrast injection, it can effectively detect small spots or nodules in the lungs.
Comparison of Radiation Dose from Different Types of Scans
๐ Standard CT chest 7 mSv
๐ Low dose CT chest 1.5 mSv
๐ Chest X-ray 0.1 mSv
Why Choose Low Dose CT
๐ Provides three - dimensional images with better detail than 2D chest X-rays
๐ Uses about 5 times less radiation than standard CT Chest (Standard CT chest uses 7 mSv* while LDCT Chest uses 1.5 mSv*)
๐ Easy to perform, takes a short time, and has minimal side effects
๐ Can detect small spots or nodules in the lungs without the need for contrast injection
Preparation and Procedure
๐ No need to fast or avoid drinking
๐ Change into a gown and lie on the examination bed inside the machine
๐ Hold your breath during the scan for about 15 - 20 seconds
๐ The scan takes approximately 5 - 10 minutes
Interpretation of Results
After the scan, a radiologist will review the images for abnormalities or the likelihood of malignancy. If there is a high chance of malignancy, further tests such as PET/CT, bronchoscopy, and biopsy may be recommended for rapid diagnosis. If the likelihood is low, continuous monitoring as advised by the physician is recommended.
Important Information About Low Dose CT Chest Results
๐ An “abnormal” result does not confirm cancer 100%. The physician will inform the patient and provide appropriate advice.
๐ Current results cannot guarantee that the detected abnormality will not develop into lung cancer or that new abnormalities will not appear in the future.
๐ Follow - up examinations may be necessary as recommended by the physician.
๐ Even if the current result is “normal,” high-risk individuals are advised to continue LDCT chest screening every 1-2 years.
Source : Phyathai Phaholyothin Hospital
Independent Writer
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